Delicate lovely little fern growing in the lean-to Victorian glass house at Stourhead National Trust property. I think this is Asplenium trichomanes ssp quadrivalens but I'm prepared to be corrected.
I find ferns tricky. Perhaps I should go on a fern course. Certainly the grass course has mitigated the fear of that group. In fact I collected around fifteen different grasses, sedges and rushes down at the reserve during my WeBS count this morning. (Watch this space.)